Liquid-fuel burner



Dec. 13, 1927.v 1,a52,193

W. H. BOEHM ETA AL LIQUID FUEL BURNER .Filed Sept'. 23, 1925 2 Sheets-Sheet 1 :i f: I1 1p Il fi i? {Hi Dec. 13, 1927.

w. H. BoEH'M E-r AL LIQUID FUEL BURNER Filed Sept, 25. 1925 2 Sheets-Sheet 2 Wzesses y M77( Ik!) IWW@ Patented Dec. i3, i927.

UNITED STATES PATENT OFFICE.

' wmrzm. H. Bouma, or ,swIssvALn AND HOWARD s. conm, or rrr'rsnunengrmsYLvANTA. l z l LIQUID-FUEL y BURNER.

Application med se'ptemberfaa, 1925. serial No. 58,079.

This inventionrelates to liquid .fuel burners for use in open-hearth lfurnaces and other industrial furnace, and more articularly adapted for burning tar, a though other li uid fuelsmay be used.

One o ject of the present invention 1s to provide a burner of this type composed rmcipally'fstandard pipe' and. fittings, w ere bythe first cost Ano er object is Ito -provide a burner' of this class having an improved construction whereby the'fuel will be more thoroughly atomzedthan in the ordinary burners herel5 tofore used.

*5 tion.

2 is an enlar d detail sectional Fi re gu rward end of the elevation through the p burner. n v

' Figure 3 is a'sectional plan through the 30 burner. v

Figure 4 is a rear end elevation.

Fi re 5 is a sectional plan taken ,on line -V of Figure2. Referrin more particularly to the drawthe `35- in the' etter A designates` the water jac et as a whole, which is composed of v mner and. outer tubular spacedk side Wall members'2 and 3, respectively, provided with end wallmembers 4 .and 5 in theform of 4 40 cap pieces which are secured to the side Wall members 2 and 3'by "welding, as at 6. The inner wall member 2 'is flattened so as to providea greater space at the bottom and top than at the sides" of thejacket. 'Water 45 is supplied to the jacket A, under pressure'. through a pressure pipe 7 which enters the 'jacket through an opening' in the rear end wall or .cap iece l5, and is welded thereto as at 8 to' orma `water-tight.,"connection 50 'or joint. The pipe 7 extendsforward along the lower part of the jacket A to V,a point 'adjacent theforward end thereof. An'outlet pipe 9 is screwed kinto an'outlet ort 10 .j located. in the top of the outer si e wall is' greatly reduced, and f -10 repair parts are readily obtainable.

cessfor cleaning. j 4

i A fuel pipe 30 is connected into the o en- ,member 3, `adjacent the rear end ofthe jacket s'ojas to provide kfor circulatiqnof the cooling water. 4\

A' fluid pressure pipe 12 is mountedland extends longitudinally within the jacket A,

and has its rear end rconnectedA by' standard elbows 13 and 14 with a su ply pipe 15 leadinfrom any source of fluidJ pressure suppl. beforwardend of the pipe'12 is threa ed into a reducingbushing 16 whichv in turn isl'tlirfe'aded indto me' of th end o emn o a stan arv 'T- i el ttin 1 8)Y whilsi forms' p p g burner.

The other end opening 19`of the Ttting, which isopposite and in line withthe opening 17, has a short standard pi nipple or the mixingicliamber ofthe connector 20 threaded therein w ich-in turn A is threaded intoand`connects a nozzle'21 y with the mixing chamber. The nozzle is provided with diverging outlet ports 22and is a specially formed fitting. Y

An atomizing member V23 in the form'of a special forging is threaded into the center mening 24 ofthe? T`itting 18. The atomizer comprises a hollow body portion 25 having lts one end closed by a perforated atomizin ywall 26 and having tapped openings 27 an 28 in its other end and side wall respec? tively. The tapped opening 27 is adapted to be normally closed by a standard pipe plug 29 and is provided so as to I ing 28 in thel side wall of the atomizer y a connecting nipple 30 andbushing 30, and

extends rearwardly through the jacket'par-- 8b' permit ready acallel withthefluid pressure pipe 12 and is 'connected at its rear end'by standard *pipe in from a suitable fuel` supply not-shown).

e atomizer 23 is provided lat its inner or atomizing end with an integral bale member 34 which extends inwardly beyond the perforated atomizing end wall 26 armaterial distance,"into the ow line of the tiuidpressure. to intercept 4the flow of fluid andpreioo j vent it striking against 'the atomizing end I wall. 'If the-fluidunder pressure `is permitted to strike orwipe the atomizin wal1f26,v

the fuel jets-would be wiped off c osealong the wall 26 andprevent the l,formation of the proper fuel jets. Therefore,l it Vis essential that the' fuel jets be free to flow a `material distance from the atomizer before coming into contact with the fluid pressure iiowing .at right angles thereto.

so 'd piece of metal, By using standard pipe., fittings and plpe as described above, a burner i havin a low first cost and low upkeep is provi ed, and repair parts may be readily obtain d.

This burner may be usedfor burnin any of the several forms of liquid fuel. glow- Yever it is particularly adapted for burning' tar and when so used the fluid pressure util-` ized to completelyatomize and mix with the tar will be steam, while whenoil is used, air under pressure will preferably be used.

In operation, assuming that tar is to be burned, the tar in a fluid state flows through the pipe 30 under suicient pressure to force through the perforations in the form of fine jets or spray. The steam under pressure is flowing through the pipe 12, into the T-it-v ting or mixing chamber 18, and is prevented from wipin the jets of fuel by the baiile 34. The fuel an steam will mix in the T-tting or mixing chamber 18 and the pressure ofthe steam and its heat will combine to' further break up and atomize the fuel into the form of a mist or vapor, in which form it is read* ily combustible and will be carried out through the nozzle 21. The distance between the mlxing chamber 18 and nozzle 21 is so short that recoagulation of the atomized efel' and condensing of the steam is preventp nasales While we have shown one preferred form ot' our invention, it will be understood that we do not wish to be limited to the exact details shown, since variousvmodifications may be made without departin from the scope of our invention as define in the appended claim.

We claim- A liquidfuel burner comprising, in combination, a tubular double-walled water jacket having both ends open to permit the free circulation of air therethrough, a standard T-pipe fittino forming a mixing chamber and mounted=` intermediate the ends of said water jacket, an atomizer screwed into the center opening of said T-itting, said atomizer com rising a hollow body member having a per orated end for atomizing the fuel and having its other end closed by a removable plug to permit access for cleaning, a

fuel pipe connected with said atomizer, a fluid pressure pipe secured into one of the end openings of said T-lttings so that the fluid under pressure will How through said mixing chamber at right angles to the fuel enterin from .said atomizer, a nozzle connected wlth the other of said end openin of said T-littiiw and terminating short o the forward en of said jacket, and -a baille formed integral with and projecting from the atomizing end of said atomizer into the flow line of the fluid from said fluid pressure pipe, to prevent the fluid pressure from striking the tperforated atomizing end of the atomizer an thereby interrupting the flow of fuel.

In testimony whereof we have hereunto set our hands.

WENZEL H. .BOEHLL HOWARD S. COREY. 

